After testing the Russian translation, it seems there's another line that's not voiced in the SE. When we talk with Stan, one of the possilbe variants to the money question is "Uh... no more than 173 pieces of eight". BUT. There's no line like this in the speech.info, only regarding 174 and 172 pieces of eight, the 173 line is taken straight from theSCUMM version during dialogue choices, BUT, since it's not voiced, the SE version (after clicking) searches for the closest thing (speech.info is heavily based on CRC-checks), which to him, it seems, is the line "I have 371 pieces of eight". So, yeah, when we choose that line of dialogue, Guybrush says "I have 371 pieces of eight".